The correct values for the correct values for kinetic energy (K.E) and potential energy (P.E) along the path of the roller coaster are highlighted or listed below.
Energy can be defined as the ability (capacity) to do work. Thus, energy is measured in Joules (J).
Generally, the two (2) main types of energy are;
- Potential energy (P.E): it is an energy possessed by an object or body due to its position (height) above the earth.
- Kinetic energy (K.E): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy (P.E) and kinetic energy (K.E) possessed by an object.
Mathematically, mechanical energy is given by the formula;
[tex]Mechanical \;energy = P.E + K.E[/tex]
According to the diagram, the correct values for kinetic energy (K.E) and potential energy (P.E) along the path of the roller coaster are;
- Point 1: kinetic energy (K.E) would be zero (0 Joules) since the coaster starts from rest while potential energy (P.E) would be 1500.0 Joules because it is at the highest height.
- Point 2: kinetic energy (K.E) would be 375.0 Joules while potential energy (P.E) would be 1125.0 Joules (second highest).
- Point 3: kinetic energy (K.E) would be 1500.0 Joules while potential energy (P.E) would be 0 Joules because it has no height.
- Point 4: kinetic energy (K.E) would be 1125.0 Joules while potential energy (P.E) would be 375.0 Joules (fourth highest).
- Point 5: kinetic energy (K.E) would be 750.0 Joules while potential energy (P.E) would be 750.0 Joules (third highest).
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